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build system: move more clang handling to xcompile 

clang requires some additional options to disable warnings which
can be handled by xcompile.
Also drop the hard coded clang compilers in Makefile

Change-Id: I0f12f755420f315127e6d9adc00b1246c6e7131b
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/7612
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Patrick Georgi 2015-06-04 13:45:40 +02:00 committed by Patrick Georgi
parent 45dd591ff6
commit 34de29aeb3
2 changed files with 12 additions and 27 deletions
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22
Makefile
View File

@ -122,32 +122,10 @@ include $(HAVE_DOTCONFIG)
include .xcompile
ifeq ($(CONFIG_COMPILER_LLVM_CLANG),y)
# FIXME: armv7/aarch64 won't build right now
# NOTE: clang puts compiler-rt under lib/linux/libclang_rt.builtins-i386.a
# this means the triple is i386-linux-elf instead of i386-none-elf
CFLAGS_x86_32 = -no-integrated-as -Qunused-arguments -target i386-linux-elf -m32
# Tone down some clang warnings
CFLAGS_x86_32 += -Wno-unused-variable -Wno-unused-function -Wno-tautological-compare -Wno-shift-overflow
CC_x86_32:=clang
HOSTCC := clang
ifneq ($(CONFIG_MMX),y)
CFLAGS_x86_32 += -mno-mmx
endif
# FIXME: we end up with conflicting flags with this, not clear on this part.
#ifneq ($(CONFIG_SSE),y)
#CFLAGS_x86_32 += -mno-sse
#endif
CFLAGS_arm = -no-integrated-as -Qunused-arguments -target arm-eabi -ccc-gcc-name $(CC_arm)
CC_arm:=clang
CFLAGS_aarch64 = -no-integrated-as -Qunused-arguments -target aarch64-eabi -ccc-gcc-name $(CC_aarch64)
CC_aarch64:=clang
endif
include toolchain.inc
strip_quotes = $(subst ",,$(subst \",,$(1)))

17
util/xcompile/xcompile
View File

@ -98,13 +98,13 @@ testas() {
# Architecture matched.
GCCPREFIX="$gccprefix"
if [ -z "$use_dash_twidth" ]; then
ASFLAGS=""
CFLAGS_GCC=""
LDFLAGS=""
else
unset ASFLAGS LDFLAGS
unset CFLAGS_GCC CFLAGS_CLANG
if [ -n "$use_dash_twidth" ]; then
ASFLAGS="--$twidth"
CFLAGS_GCC="-m$twidth"
CFLAGS_CLANG="-m$twidth"
LDFLAGS="-b $full_arch"
fi
@ -114,6 +114,7 @@ testas() {
"elf32-i386" )
LDFLAGS="$LDFLAGS -melf_i386"
CFLAGS_GCC="$CFLAGS_GCC -Wl,-b,elf32-i386 -Wl,-melf_i386"
CFLAGS_CLANG="$CFLAGS_GCC -Wl,-b,elf32-i386 -Wl,-melf_i386"
;;
esac
@ -140,6 +141,8 @@ detect_special_flags() {
x86)
testcc "$GCC" "$CFLAGS_GCC -Wa,--divide" &&
CFLAGS_GCC="$CFLAGS_GCC -Wa,--divide"
testcc "$CLANG" "$CFLAGS_CLANG -Wa,--divide" &&
CFLAGS_CLANG="$CFLAGS_CLANG -Wa,--divide"
# Always build for i686 -- no sse/mmx instructions since SMM
# modules are compiled using these flags. Note that this
# doesn't prevent a project using xcompile to explicitly
@ -174,6 +177,10 @@ COMPILER_RT_${TARCH}:=${CC_RT_GCC}
COMPILER_RT_FLAGS_${TARCH}:=${CC_RT_EXTRA_GCC}
else
CC_${TARCH}:=${CLANG}
CFLAGS_${TARCH}:=${CFLAGS_CLANG}
CFLAGS_${TARCH}+=-no-integrated-as -Qunused-arguments -m${TWIDTH}
# tone down compiler warnings
CFLAGS_${TARCH}+=-Wno-unused-variable -Wno-unused-function -Wno-tautological-compare -Wno-shift-overflow
COMPILER_RT_${TARCH}:=${CC_RT_CLANG}
COMPILER_RT_FLAGS_${TARCH}:=${CC_RT_EXTRA_CLANG}
endif